R2x Stain & Soil Remover is the most effective carpet cleaning product available for both commercial and residential carpets. For the toughest high traffic areas, this is the product you want. It deep cleans to remove stains and soils, while enhancing stain resistance to keep carpeting cleaner, longer. Even old stains come clean, as R2x Stain & Soil Remover provides protection against reoccurring spots. R2x Stain & Soil Remover is formulated for superior performance as a spot cleaner, pre-spray extraction cleaner, or as an interim product for the encapsulation process. There is no reason to rinse, or use an acid rinse.